HttpHeader doesn't work at all

  • Latest STFE (SeoTools_v9.7.3.0_20230307),
  • latest Excel (Microsoft® Excel® für Microsoft 365 MSO (Version 2303 Build 16.0.16227.20202) 64 Bit ),
  • Tested on different domains.

With only cell reference or url and without setting of header name, like this =@HttpHeader(""), or this =@HttpHeader(A1)

I get just empty cell.

If I set the cell address and header name, like this =@HttpHeader(A1;"x-robots-tag") I get #NULL

Have you tried resetting the Global HTTP Settings? This is my result using the default settings: