Unfortunately, we do not work via TeamViewer.
Could you provide a video or screenshots of the problem? (Record a video, upload it on a filesharing service, for example, https://dropmefiles.com.ua/en/ , and provide URL via the Private Content area / You can use Lightshot screenshot or Gyazo tool to make a screenshot and share the link here.)
If the problem persists in Firefox only, make sure you are using the latest version of the browser.
We ask about temporary wp-admin access, you will be able to delete the user once the problem will be solved.
wp-admin access: Create an account via Dashboard (Users > Add new) with administrator role http://prntscr.com/s3rc9m > provide us with username and password via the Private Content area http://prntscr.com/s5mao7 You can use any email for it.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.