WordPress encoding problem

Hello,

in few past weeks I’m facing a problem with wordpress encryption (I suppose) and as this problem seems unsolvable to me, I’d like to ask you for help.

The main problem is that whenever I try to enter wordpress administration pages such as general customization, page edit, customization of the page blocks and other, the page shows just a bunch of symbols or code.

Sometimes it looks like this:

ckCountDownTextTypography\":{\"fontType\":\"\",\"systemFont\":\"\",\"googleFont\":\"\",\"customFont\":\"\",\"fontSize\":{\"desktop\":\"\",\"tablet\":\"\",\"mobile\":\"\"},\"fontWeight\":\"\",\"textTransform\":\"\",\"fontStyle\":\"\",\"textDecoration\":\"\",\"lineHeight\":{\"desktop\":\"\",\"tablet\":\"\",\"mobile\":\"\"},\"letterSpacing\":{\"desktop\":\"\",\"tablet\":\"\",\"mobile\":\"\"}},\"blockCountDownBorder\":{\"borderStyle\":\"none\",\"borderTop\":\"\",\"borderRight\":\"\",\"borderBottom\":\"\",\"borderLeft\":\"\",\"borderColorNormal\":\"\",\"borderColorHover\":\"\",\"borderRadiusType\":\"px\",\"borderRadiusTop\":\"\",\"borderRadiusRight\":\"\",\"borderRadiusBottom\":\"\",\"borderRadiusLeft\":\"\"},\"blockImageSliderBgImageOptions\":{\"backgroundImage\":\"\",\"desktopHeight\":\"650\",\"tabletHeight\":\"450\",\"mobileHeight\":\"300\",\"backgroundSize\":\"cover\",\"backgroundPosition\":\"center\",\"backgroundRepeat\":\"no-repeat\",\"backgroundAttachment\":\"scroll\"},\"blockImageSliderBgColorHeight\":{\"type\":\"px\",\"desktop\":\"550\",\"tablet\":\"450\",\"mobile\":\"300\"},\"blockImageSliderImageOverlayColor\":{\"enable\":false,\"normal\":\"\",\"hover\":\"\"},\"blockImageSliderDotsColor\":{\"enable\":false,\"normal\":\"\",\"hover\":\"\"},\"blockImageSliderDotsButtonBorder\":{\"borderStyle\":\"none\",\"borderTop\":\"\",\"borderRight\":\"\",\"borderBottom\":\"\",\"borderLeft\":\"\",\"borderColorNormal\":\"\",\"borderColorHover\":\"\",\"borderRadiusType\":\"px\",\"borderRadiusTop\":\"\",\"borderRadiusRight\":\"\",\"borderRadiusBottom\":\"\",\"borderRadiusLeft\":\"\"},\"blockImageSliderArrowsBgColor\":{\"enable\":false,\"normal\":\"\",\"hover\":\"\"},\"blockImageSliderArrowsTextColor\":{\"enable\":false,\"normal\":\"\",\"hover\":\"\"},\"blockImageSliderNextArrow\":{\"label\":\"fa-angle-right\",\"value\":\"fas fa-angle-right\",\"code\":\"f105\"},\"blockImageSliderPrevArrow\":{\"label\":\"fa-angle-left\",\"value\":\"fas fa-angle-left\",\"code\":\"f104\"},\"blockImageSliderArrowButtonHeight\":{\"desktop\":\"40\",\"tablet\":\"30\",\"mobile\":\"20\"},\"blockImageSliderArrowButtonWidth\":{\"desktop\":\"40\",\"tablet\":\"30\",\"mobile\":\"20\"},\"blockImageSliderArrowButtonBorder\":{\"borderStyle\":\"none\",\"borderTop\":\"\",\"borderRight\":\"\",\"borderBottom\":\"\",\"borderLeft\":\"\",\"borderColorNormal\":\"\",\"borderColorHover\":\"\",\"borderRadiusType\":\"px\",\"borderRadiusTop\":\"\",\"borderRadiusRight\":\"\",\"borderRadiusBottom\":\"\",\"borderRadiusLeft\":\"\"},\"blockImageSliderCaptionImageMargin\":{\"type\":\"px\",\"desktopTop\":\"\",\"desktopRight\":\"\",\"desktopBottom\":\"\",\"desktopLeft\":\"\",\"tabletTop\":\"\",\"tabletRight\":\"\",\"tabletBottom\":\"\",\"tabletLeft\":\"\",\"mobileTop\":\"\",\"mobileRight\":\"\",\"mobileBottom\":\"\",\"mobileLeft\":\"\"},\"blockImageSliderCaptionImageWidth\":{\"type\":\"px\",\"desktop\":\"\",\"tablet\":\"\",\"mobile\":\"\"},\"blockContainerParagraphColor\":{\"enable\":false,\"normal\":\"\",\"hover\":\"\"},\"blockContainerParagraphTypography\":{\"fontType\":\"default\",\"systemFont\":\"\",\"googleFont\":\"\",\"customFont\":\"\",\"desktopFontSize\":\"\",\"tabletFontSize\":\"\",\"mobileFontSize\":\"\",\"fontWeight\":\"\",\"textTransform\":\"\",\"fontStyle\":\"\",\"textDecoration\":\"\",\"desktopLineHeight\":\"\",\"tabletLineHeight\":\"\",\"mobileLineHeight\":\"\",\"desktopLetterSpacing\":\"\",\"tabletLetterSpacing\":\"\",\"mobileLetterSpacing\":\"\"},\"blockContainerParagraphMargin\":{\"type\":\"px\",\"desktopTop\":\"\",\"desktopRight\":\"\",\"desktopBottom\":\"\",\"desktopLeft\":\"\",\"tabletTop\":\"\",\"tabletRight\":\"\",\"tabletBottom\":\"\",\"tabletLeft\":\"\",\"mobileTop\":\"\",\"mobileRight\":\"\",\"mobileBottom\":\"\",\"mobileLeft\":\"\"},\"blockContainerParagraphPadding\":{\"type\":\"px\",\"desktopTop\":\"\",\"desktopRight\":\"\",\"desktopBottom\":\"\",\"desktopLeft\":\"\",\"tabletTop\":\"\",\"tabletRight\":\"\",\"tabletBottom\":\"\",\"tabletLeft\":\"\",\"mobileTop\":\"\",\"mobileRight\":\"\",\"mobileBottom\":\"\",\"mobileLeft\":\"\"},\"blockContainerH1Color\":{\"enable\":false,\"normal\":\"\",\"hover\":\"\"},\"blockContainerH1Typography\":{\"fontType\":\"default\",\"systemFont\":\"\",\"googleFont\":\"\",\"customFont\":\"\",\"desktopFontSize\":\"\",\"tabletFontSize\":\"\",\"mobileFontSize\":\"\",\"fontWeight\":\"\",\"textTransform\":\"\",\"fontStyle\":\"\",\"textDecoration\":\"\",\"desktopLineHeight\":\"\",\"tabletLineHeight\":\"\",\"mobileLineHeight\":\"\",\"desktopLetterSpacing\":\"\",\"tabletLetterSpacing\":\"\",\"mobileLetterSpacing\":\"\"},\"blockContainerH1Margin\":{\"type\":\"px\",\"desktopTop\":\"\",\"desktopRight\":\"\",\"desktopBottom\":\"\",\"desktopLeft\":\"\",\"tabletTop\":\"\",\"tabletRight\":\"\",

Sometimes like this:

wport_width":1200,"name":"core\/media-and-text-in-a-full-height-container"},{"id":192,"title":"Media and text with image on the left","content":"\n
\"Close-up,<\/figure>
\n
Open Spaces<\/strong><\/h3>\n\n\n\n

See case study \u2197<\/a><\/p>\n<\/div><\/div>\n","categories":["featured","header"],"keywords":["core"],"description":"Media and text block with image to the left and text to the right.","viewport_width":1200,"name":"core\/media-and-text-with-image-on-the-left"},{"id":195,"title":"Media and text with image on the right","content":"\n
\"A<\/figure>
\n
Shore with Blue Sea<\/strong><\/h2>\n\n\n\n

Eleanor Harris (American, 1901-1942)<\/p>\n<\/div><\/div>\n\n\n\n

<\/p>\n","categories":["header"],"keywords":["core"],"description":"Media and text block with image to the right and text to the left.","viewport_width":1200,"name":"core\/media-and-text-with-image-on-the-right"},{"id":27,"title":"Quote","content":"\n
\n\n\n\n
\"A<\/figure><\/div>\n\n\n\n

    \"Contributing makes me feel like I'm being useful to the planet.\"<\/p>\u2014 Anna Wong, Volunteer<\/em><\/cite><\/blockquote>\n\n\n\n

The font also goes bigger and bigger throughout the page.

All the other content on the site seems to be left without any changes, working well, I just cannot edit the pages nor the website as any customization is not working at this moment.

When I tried to fix this problem before I decided to ask you for help, I tried disabling some of the plugins because I thought it’s a plugin collision first, it didn’t help at all though. These plugins have also been working together fine until this problem encountered.

It is true that I updated the wordpress to a never version, but it’s also been a while since the update when the problem showed up.

All the active plugins on the page are:

All in one favicon
Cookie Notice & Compliance for GDPR / CCPA
Download Manager
Easy WP SMTP
Gutentor – Gutenberg Blocks – used to create all the content on the site
Loco Translate
Nginx Cache
Really Simple SSL
Ultimate Member
WPForms

At this point I am completely hopeless because the only solution to me right now seems to be the remake the website all over again, but unfortunately, it is not the most suitable solution for me as the site has been already working and it would disable the site for a really long time.

Is there anyone, who could help me, please?

The page I need help with: [log in to see the link]