You can check page no 172 of SMU guide and get the FTP method of how to install license file through Command line,
https://support.hpe.com/hpesc/public/docDisplay?docId=a00017707en_us
Also refer page no 194 of Command Line guide to get procedure of how to enable FTP or SFTP,
https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=emr_na-a00017709en_us
Regarding Browser issue, try opening from different browser for both controller. You can also try clearing temporary files and cache of browser. You can try from different Laptop or desktop system. You can try connecting your Laptop directly to management port of MSA controller and check.
Hope this helps!
Regards
Subhajit
I am an HPE employee
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