Sorry. You are correct. Xinha is an open source html editor. Our sites are all php based and do not use anything other than Xinha for content. Since these all started having issues within the same week, I had tech support from our hosting company take a look. They tried disabling security mod, but beyond that, nothing else so far. They have suggested that there is a missing extension or plugin possibly. They also said that the only change to the server they have made is the addition of a php selector within the cpanel instead of using php.ini.
Although I have had employed coders in the past, I am not a coder. I can certainly implement suggestions, and provide information, but beyond that, I am a bit lost. I can provide error logs and anything else that may help shed light on this. Thank you.