Try to check your transaction history, so you can find out where your ETC is going, CLO or callisto network does not affect your ETC, in some exchanges or wallets ETC holders will get CLO because of the existence of the ETC fork, and that doesn't eliminate your ETC.
In history of his address are only incoming transfers, so coins are still there.
I don't know why you can not see your coins in that wallet, but in block explorer you can clearly see that 190.2930 Ether is in your wallet:
https://gastracker.io/addr/0xc5927134f887e20f1e9f4b62c6c85a199f0f6fb2So calm down, because you didn't lost anything.
Ps. For everything to be in line with forum rules, move this thread to the Altcoin section using the options on the left at the bottom of the page.
Maybe there is the need to update java and flash. He used 4 web browser at a time, and I guess this could be the problem. If you can access it to another browser probably the chrome he had since it looks like its the primary browser he used base upon the screenshot he did.
https://imgur.com/a/V1uCWt1Internet explorer still is breathin.
lol yeah! Nice collection of browsers anyway
I also think that he should update something or try to open this wallet in another browser.
He can also check if the website has a newer version of wallet explorer.