According to the error message, if your disk space is not full and your current system account has file access rights (create a new file in the same directory, and if the new file is opened normally, it will have normal access rights. ) In the third case, your file is damaged. If you used this computer to save or edit files before, you can find backup files in the backup center:

Take wps20 19 as an example (ppt operation of text table is consistent).