I don't know why suddenly the two minified files sidecar/minified/sidecar.min.js and sidecar/minified/sidecar.lite.min.js were both empty (their size was zero). due to this reason login page was not loading.
I copied same file from test server then it works. Only change i did as http to https url.
How we can solve this issue? we are using sugar professional v7.6.2.
Please help. thanks