Problem with traccar 3.17

I upgraded to traccar version 4.1 but had some problems with the custom map.
For this reason I downgraded back to version 3.17 but I still have some problems with the downgrade:

HTTP 405 Method Not Allowed - NotAllowedException (...)

https://www.dropbox.com/s/5hjy5xlmfc1yol9/Problem.PNG

It tries to access the following url that doesn't exists:

Get http://traccar.infrabel.be/api/notifications/notificators?_dc=1540295646967&page=1&start=0&limit=25 405 (Method Not Allowed)

https://www.dropbox.com/s/uply9lti89ubdnl/Problem2.PNG

Is there a way to fix this problem from happening?

How did you downgrade? Have you restored original 3.17 database?

I have restored the original database and reinstalled the old windows exe
It could be a database problem, because I didn't have a backup so I restored it by hand. But I checked with a new database and everything looks the same now.

Most likely it's the database then.

I had the same, but it was definitely not the database (I backed everything up before, so I could bring it back).
Still I had the same issue afterwards.

I could fix it by clearing my browsers cache and cookies (also in the Android app I had to clean memory). Then it was working fine on 3.17 again.

Andi

Make sure you cleared browser cache.

Thx that was the problem, when I cleared my cache everything works properly