Just for future reference, it’d be greatly appreciated if you could post the English version of the error message so that it will be easier for other Matomo forum members to help you.
That being said, I believe the error that you have is this one (in English):
Oops… there was a problem during the request. Maybe the server had a temporary issue, or maybe you requested a report with too much data. Please try again. If this error occurs repeatedly please contact your Matomo administrator for assistance
There are a few solutions to this, check below, maybe one of them will do the trick for you:
Official error from Matomo:
Other forum solutions:
Let us know how you go with it : )