Hello
add this inside web.config file
<httpRuntime requestPathInvalidCharacters="" />
Strapi admin is using axios to process CRUD.
On windows IIS probably you have created a host so iis not allowing to process
It is giving this error but we cannot see due to axios request and error detail is hidden by IIS.
“A potentially dangerous Request”
anyway I solved and finally i get rid.
just need to edit web.config file to allow that process.
hope works