# Common problems #### Correction of incorrect display of Russian or others characters You need to execute for all screens or execute in the root and then recreate the screens #### Premium features not working for players Check the verification\_server file in the server root to see if it matches the one on github. Or contact the developer #### Server does not start Try to start server using `./clear_start.sh` or `luajit start.lua` and check output --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://book.denismakhortov.com/server/problems.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.