My error log is repeatedly showing this error: TypeError: Cannot read property ‘on’ of undefined at https://forum.example.com/assets/plugin-third-party-79ea46991b76279d783d995c65d62ffb2f95ae7e68e0c79644ba01b7649d2a95.js:1:14095 at https://forum.example.com/assets/plugin-third-party-79ea46991b76279d783d995c65d62ffb2f95ae7e68e0c79644ba01b7649d2a95.js:1:14175 How do I know which plugin this javascript file is from?

Hmn, I’m no smarter now than I was 29 minutes ago. (same goes for hours, days and months). What plugins have your got installed? Try ./launcher enter app cd public/assets cat plugin-third-party-865e853871f20eeae50c3bede19ef7d8bd5352766ee238799cb2bb94caaecd68.js (actually “cat plugin-third-party-865e” then tab to auto complete, the first hit will probably be the .js file) You will find the name of the plugin mentioned in the .js file if you scroll up. (There are more elegant ways to do this.)

[image] tophee: How do I know which plugin this javascript file is from? By disabling them all and then enabling them one by one.

[image] zogstrip: By disabling them all and then enabling them one by one. Hm, the problem is that the error seems to occur intermittently so that if it doesn’t occur, I can never be sure whether it’s because the plugin is disabled or because it decided to keep quiet for a while. Any other way?

[image] tophee: Any other way? Apart from studying the source code of each plugins, I can’t think of any other way.

[image] zogstrip: Apart from studying the source code of each plugins, I can’t think of any other way. I have tried to find that js file to see if there’s any hint in it, but I have no idea where to find it (I’m using docker).

Info (domain replaced): Uncaught TypeError: Cannot read property 'on' of undefined Url: https://forum.example.com/assets/plugin-third-party-865e853871f20eeae50c3bede19ef7d8bd5352766ee238799cb2bb94caaecd68.js Line: 1 Column: 14095 Window Location: https://forum.example.com/latest The OP was from b.acktrace env (edited): hostname *** process_id [143, 135, 150] application_version f918951d42234790938da442a768c2bf80f87069 HTTP_HOST forum.example.com REQUEST_URI /logs/report_js_error REQUEST_METHOD POST HTTP_USER_AGENT [Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36, Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36] HTTP_ACCEPT */* HTTP_REFERER https://forum.example.com/ HTTP_X_FORWARDED_FOR [83.xx.xx.xx, unix:, 130.xxx.xx.xx, unix:] HTTP_X_REAL_IP unix: params message Uncaught TypeError: Cannot read property 'on' of undefined Url: https://forum.example.com/assets/plug url https://forum.example.com/assets/plugin-third-party-865e853871f20eeae50c3bede19ef7d8bd5352766ee238799 line 1 column 14095 window_location https://forum.example.com/ stacktrace TypeError: Cannot read property 'on' of undefined at https://forum.example.com/assets/plugin-thir

This, I thought was quite elegant and fast. I found the perpetrator it’s the national-flags plugin and I will disable it right away. Thank you so much!

How to identify which plugin causes error

Product Support

JagWaugh (Andrew Waugh) March 1, 2017, 9:25am 6

What do the info, backtrace, and env tabs of /logs contain for that error?

Topic		Replies	Views
Reporting which plugin has caused the error Feature	5	1315	July 10, 2017
How to track down plugin errors Product Support	6	526	September 11, 2022
Lots of errors in Logs Product Support	6	1026	May 21, 2019
TypeError: Cannot read property 'id' of undefined Product Support	16	5567	November 29, 2018
Uncaught TypeError: Cannot read property 'val' of undefined Url Self-hosting	1	1233	April 29, 2019

How to identify which plugin causes error

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