After a fresh installation of Lazarus and WEB Core 1.5 under Windows, trying to compile my first TMS Web Core Application, I got the error message above.
Turns out the settings for TMS Web Core under Tools->Options need fixing.
All the binaries for Windows are now in $(TMSWebDir)\bin\Win32 (Web Compiler and Web Server) and $(TMSWebDir)\bin\Win32 (Web Runner Win32) or $(TMSWebDir)\bin\Win64 (Web Runner Win64).
It's not a big deal, but the Out of the Box experience suffers a bit.
OOB:
Fix:
Greetings,
Joerg