Moodle in English: SyntaxError: Unexpected end of JSON input after 3.10 update

Hi,

First of all - we're using system since 2.x ver, so sometimes some inner texts/ files might have different encoding etc . (maybe this could be related)

Now the probelm - we where absolutely fine on 3.8 without ANY TROUBLES , and after we updated to 3.10 + (currently (Build: 20201204)) popup with SyntaxError: Unexpected end of JSON input after 3.10 update started popping out for many teachers and pupils . (see screenshots) .

Also i attach server side error log , which alo became huge after update.

PS theres also these line in CRON error execution :
func=xmlSecCheckVersionExt:file=xmlsec.c:line=188:obj=unknown:subj=unknown:error=19:invalid version:mode=abi compatible;expected minor version=2;real minor version=2;expected subminor version=25;real subminor version=26

If you have any clues where to look for troubles - please let me know

Thanks in advance !

error.log

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Re: SyntaxError: Unexpected end of JSON input after 3.10 update

autor Howard Miller - piatok, 11 decembra 2020, 22:08

This is usually a symptom rather than the problem - most likely the Javascript is trying to parse an error message

- Switch on Debugging
- Switch on your browser's Javascript Console
- reproduce the problem

Anything in the console (red errors)? Anything in your web server's error log?

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Re: SyntaxError: Unexpected end of JSON input after 3.10 update

autor Kodo Mafija - piatok, 11 decembra 2020, 23:53

Hi
With debug enabled - i'm getting same picture, with no ERRORs only 2 warnings in console . and just some more text in popup which doesnt makes anything clearer

Server error has NO ENTRIES during this .

(In fact i can provide with URL / Access personally if you think you can help me on this

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Re: SyntaxError: Unexpected end of JSON input after 3.10 update

autor Kodo Mafija - sobota, 12 decembra 2020, 06:25

I Found out that the probable error is genereting here :

https://moodle.MYSITE/lib/ajax/service.php?sesskey=0JkDz23brR&info=media_videojs_get_language

as it returns :

{"error":"Coding error detected, it must be fixed by a programmer: Invalid json in request: Syntax error","errorcode":"codingerror","stacktrace":null,"debuginfo":null,"reproductionlink":null}

However - no error on serverside is generated....
ANy ideas ?

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Ats.: Re: SyntaxError: Unexpected end of JSON input after 3.10 update

autor Danutė Pranckutė - piatok, 8 januára 2021, 20:45

I do not have solution for u, but did you notice that this error pop-up appears only using LT language? If you switch to english or german pop-up disappear.

In my case - this error show only where video is integrated, and video does not play.

Still no answer how to fix

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