I have installed via composer silverstripe-australia / silverstripe-multisites and before it also silverstripe / multivaluefield, which is required, then mysite/dev/build?flush=1 and then instead of normal webpage frontend only html code has appeared an within this part of code this message : "Fatal error: Call to a member function setStatusCode() on a non-object in C:\wamp\www\pokus\framework\dev\Debug.php on line <i>340</i></th>." Then I have tried to uninstall module silverstripe-multisites according to instructions in this forum - deleting folder with module and then mysite/dev/build?flush=1, but when I have tried to refresh CMS frontend, Chrome has showed me an error message "ERR_TOO_MANY_REDIRECTS" and Firefox, that webpage doesn't exist.
Everything was OK before, and I have installed several modules before, only blog module it refused to install, I don't know why (I have installed before all required modules with dependencies ). There was error message, that silverstripe / tagfield packages are missing, but I have installed tagfield module without any errors via composer.
Thank you for suggestions.