Iāve never seen this happening, but ā127.0.0.1ā means ālocalhostā in IPv4, and ā::1ā means ālocalhostā in IPv6. Both are the network address that designates your own machine. For some reason, the system is alternating between one and the other, thus giving that error.
You can disable IPv6 on your computer.
You can try using your LAN IP address instead, something like 10.0.0.33 or 192.168.0.4 (you can find your network address with running ipconfig on a command-line, but it might change).
You can check what you have in SuiteCRMās config.php, under āsite_urlā and āhost_nameā. I donāt know if changing that might affect this problem or not.