Hello there. Your site does seem to be working, however, you are violating the TOS and have grounds for permanence suspension of all your accounts.
Per the TOS, InfinityFree is meant for hosting websites, and not files. NextCloud is a file hosting/sharing service. Therefore, by installing a NextCloud product on your account, you are violating our TOS. Please remove the installation, and read the TOS before continuing. I linked it below.
Thanks