I have the similar issue as:
Suddenly my word fields are not replaced anymore and the doc to pdf conversion fails with:
"Could not find file 'C:\\Users\\ContainerAdministrator\\AppData\\Local\\Temp\\ASPNETCORE_8c7bad7…...double constant values using the dot as the decimal separator (i.e...
Perform Mail Merge to create documents like letters, labels and envelopes. Mail Merge regions in the document or insert special merge fields....dot), it can be a normal .doc document...