Hello @mapscom,
Thanks for asking.
It’s a humble request that you ask question in English language. We use English as a medium of communication and it’s quite difficult to interpret the questions posted in non english language and can create lot of confusion which slows down the response time.
I used Google Translate to understand your question. It seems that you are getting error code 500 in WordPress admin section. There can be multiple reasons for 500 error code. I suggest you to try out following solutions mentioned in following post and let us know how it goes:
Thanks.