Restarting Apache reports an error "(20014) Internal error (specific information not available): AH00058"

Today, I came across a friend's pagoda panel, which has LAMP combination software installed. When restarting the Apache configuration, an error was reported, "(20014) Internal error (specific information not available): AH00058". How to solve the problem.

Problems encountered:

We see that the file httpd.pid in the logs subdirectory of the apache directory is empty (this file records the process ID). It may be caused by the server being shut down for no reason, such as sudden disconnection and lost files. How can we solve this problem?

terms of settlement:

We find the httpd.pid file, and then randomly write some content in it before restarting.