SyntaxError: JSON.parse: unexpected character

I try to desactive all plug-in, nothing, do it with 2 differents websites

when i dowgrade from jetpack.4.4.1 to jetpack.4.2.2 it first look like to be fine.

when i dowgrade from 4,4,1 to jetpack.4.2.2 it look like good

Could you let me know what other plugins are currently active on your site?

Could you also try the following, after installing Jetpack 4.4.1 again:

1. Open the dashboard page.
2. Open your browser console
3. Click on the Network tab
4. Refresh the page.
5. Try to activate or deactivate a module
6. If you see any lines in red inside the browser console, click on them. A new panel should appear on the right.
7. Click on the “Response” tab in that new panel.
8. Copy the message displayed there.
9. Paste it here.
10. If no red lines appeared in the browser console, click on the “Console” tab of the browser console.
11. Copy any errors displayed there, and paste them here.

Thanks!

Until we find a way to solve that problem, you can use the old Jetpack Settings to activate and deactivate modules on your site:
https://yoursite.com/wp-admin/admin.php?page=jetpack_modules

I do this but there is no error to report…. why? ??? that the one million dollar question

Open the dashboard page.
Open your browser console
Click on the Network tab
Refresh the page.
Try to activate or deactivate a module
If you see any lines in red inside the browser console, click on them. A new panel should appear on the right.
Click on the “Response” tab in that new panel.
Copy the message displayed there.
Paste it here.
If no red lines appeared in the browser console, click on the “Console” tab of the browser console.
Copy any errors displayed there, and paste them here.

Curiously this (https://yoursite.com/wp-admin/admin.php?page=jetpack_modules) is working perfectly… I don’t get any problem jetpack work well when i use it. I get no error, i can desactivate something and is is maintened a deactivated, i can active something…

i try it in firefox22 firefox 44 and chrome

and for the plugin (good luck, that only active plugin): (I naturally try to deactivate everything/ no difference)
in my second website same problem but it has less plugin

Add From Server
Akismet
BackWPup
Connects – Mailjet Addon
ConvertPlug
Disable New User Notifications
Eggplant 301 Redirects
Google +1 for Jetpack
Jetpack par WordPress.com
Jetpack Subscriptions Checkbox
Lazy Widget Loader
Lingotek Translation
List category posts
Login LockDown
Members
No Self Pings
Opt-In Panda | BizPanda
polylang
social locker bizpanda
social media feather
social media widget
soumettresource
stop pammers pam control
table of contents plus
the events calendar
velvet blues update urls
wprobot3
wp user avatar xp member
wp optimize
wp page navi
wp polls

Jetpack Debug:
Test de la compatibilité de votre site avec Jetpack en cours…
Votre Jetpack semble être configuré correctement !

no error to report…. why? ??? that the one million dollar question

Indeed! The lack of error is weird.

I can see one plugin that may block WP REST API requests on your site. Do you use Members to make your site private? If so, could you try to deactivate that option in Settings > Private, and let me know if it helps?

If making your site public isn’t an option, then I’m afraid you’ll need to keep using the old Settings page.

Curiously this (https://yoursite.com/wp-admin/admin.php?page=jetpack_modules) is working perfectly

That’s to be expected, as this page doesn’t use the same method to activate or deactivate modules.

I can see one plugin that may block WP REST API requests on your site. Do you use Members to make your site private? that wp member not members but no , my site is fully public but thank for the info .

Could you then try to deactivate each one of your plugins, one at a time, and let me know if you find a specific plugin that causes the issue?

Thanks!

I was never found the problem, but I get a strange issue with lingotek, everything is translated exept the post tex.

I’m not sure I can help you with lingotek, you’ll need to ask the plugin author for help.

I would be happy to take a closer look at those REST API issues, though. Could you contact us via this contact form and mention this thread, so I can run some more tests with you?

Thanks!

what i try :desactivate firewall from ovh , nothing happen
go to permalink and save it , nothing happen
try to desactivate jetpack and/or lingotek , i get now a complete message : échec de l’activation de CSS Personnalisé. SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
and not JSON.parse: unexpected character

try to delete htacces, nothing happen,

try to follow the written tablets of Skeloss Dancing at the full moon in the midst of the twelve statuettes wrapped in ham (joke), nothing happen

try to follow the written tablets of Skeloss Dancing at the full moon in the midst of the twelve statuettes wrapped in ham

Yeah, the ham won’t help I’m afraid ??

Could you contact us via the form I published above, so I can take a closer look and run some tests with you?

Thanks!