Speed problems due to error 403

Hello everybody,

my employer bought the plugin and I installed it. In principle everything works, but I noticed that the page is much slower. After a little analysis (GTMetrix) I realized that some scripts can not be loaded because they are called via a “wrong” URL.

Example:

Correct: https://www.galvanotechnik-for-you.de/wp-json/wpstatistics/%5B…%5D

Wrong: https://www.galvanotechnik-for-you.de/de/wp-json/wpstatistics/%5B…%5D

I tried to solve it through the caching system by merging the files. But then I get problems with other plugins.

What can I do?