Problem when previewing PDF

Hello,

I downloaded the plugin and at first glance everything seems to be working great, however i am experiencing some inconsistencies when trying to preview PDF-files.

Sometimes the console shows a bunch of 404’s along with the message “elfinder debug: [error] [njt-fs-file-manager] Unable to connect to backend.<br>Backend not found.<br>HTTP error 404”. Other times the photopea editor opens, but doesn’t load the file.

Console shows:
pp.js:10964 Service worker active
pp.js:7249 Extra parameter Spcn
pp.js:7642 SyntaxError: Unexpected token (6:0)
at a.raise (ext.js:5620)
at a.unexpected (ext.js:5635)
at a.parseExprAtom (ext.js:5595)
at a.parseExprSubscripts (ext.js:5591)
at a.parseMaybeUnary (ext.js:5590)
at a.parseExprOps (ext.js:5588)
at a.parseMaybeConditional (ext.js:5587)
at a.parseMaybeAssign (ext.js:5586)
at a.parseExpression (ext.js:5585)
at a.parseStatement (ext.js:5644)

Any help would be appreciated.

Many thanks
Jonas