Public link sharing error if the master key is enabled

[Anulap]

Nextcloud version 11.0.1
Operating system and version CentOS 7.3.1611
Apache version 2.4.6
PHP version 7.0.15

I had a clean nextcloud install. I enabled encryption app, enabled master-key via occ and then enabled encryption.
After that, I uploaded a file to nextcloud and tried to share it via link. After I open the link on another PC, I try downloading this file and I get this:

"Can't read file. Private key missing for user. Please try to log out and log in again."

Logs

Nextcloud log (data/nextcloud.log)

Nextcloud log

Exception: {"Exception":"OCA\Encryption\Exceptions\PrivateKeyMissingException","Message":"Private Key missing for user: please try to log-out and log-in again","Code":0,"Trace":"#0 \/var\/www\/nextcloud\/apps\/encryption\/lib\/KeyManager.php(420): OCA\Encryption\Session->getPrivateKey()\n#1 \/var\/www\/nextcloud\/apps\/encryption\/lib\/Crypto\/Encryption.php(476): OCA\Encryption\KeyManager->getFileKey('\/nc17admin\/file...', 'master_b2f4d856')\n#2 \/var\/www\/nextcloud\/lib\/private\/Files\/Storage\/Wrapper\/Encryption.php(328): OCA\Encryption\Crypto\Encryption->isReadable('\/nc17admin\/file...', NULL)\n#3 \/var\/www\/nextcloud\/lib\/private\/Files\/Storage\/Wrapper\/Wrapper.php(169): OC\Files\Storage\Wrapper\Encryption->isReadable('files\/rogue_leg...')\n#4 \/var\/www\/nextcloud\/lib\/private\/Files\/View.php(1120): OC\Files\Storage\Wrapper\Wrapper->isReadable('files\/rogue_leg...')\n#5 \/var\/www\/nextcloud\/lib\/private\/Files\/View.php(485): OC\Files\View->basicOperation('isReadable', '\/rogue_legacy_s...')\n#6 \/var\/www\/nextcloud\/lib\/private\/Files\/Filesystem.php(655): OC\Files\View->isReadable('\/\/rogue_legacy_...')\n#7 \/var\/www\/nextcloud\/lib\/private\/legacy\/files.php(260): OC\Files\Filesystem::isReadable('\/\/rogue_legacy_...')\n#8 \/var\/www\/nextcloud\/lib\/private\/legacy\/files.php(120): OC_Files::getSingleFile(Object(OC\Files\View), '\/', 'rogue_legacy_st...', Array)\n#9 \/var\/www\/nextcloud\/apps\/files_sharing\/lib\/Controllers\/ShareController.php(545): OC_Files::get('\/', 'rogue_legacy_st...', Array)\n#10 [internal function]: OCA\Files_Sharing\Controllers\ShareController->downloadShare('MEWznleDQZDF0e4', NULL, '', '')\n#11 \/var\/www\/nextcloud\/lib\/private\/AppFramework\/Http\/Dispatcher.php(160): call_user_func_array(Array, Array)\n#12 \/var\/www\/nextcloud\/lib\/private\/AppFramework\/Http\/Dispatcher.php(90): OC\AppFramework\Http\Dispatcher->executeController(Object(OCA\Files_Sharing\Controllers\ShareController), 'downloadShare')\n#13 \/var\/www\/nextcloud\/lib\/private\/AppFramework\/App.php(111): OC\AppFramework\Http\Dispatcher->dispatch(Object(OCA\Files_Sharing\Controllers\ShareController), 'downloadShare')\n#14 \/var\/www\/nextcloud\/lib\/public\/AppFramework\/App.php(136): OC\AppFramework\App::main('ShareController', 'downloadShare', Object(OC\AppFramework\DependencyInjection\DIContainer))\n#15 \/var\/www\/nextcloud\/core\/routes.php(140): OCP\AppFramework\App->dispatch('ShareController', 'downloadShare')\n#16 [internal function]: OC\Route\Router->{closure}(Array)\n#17 \/var\/www\/nextcloud\/lib\/private\/Route\/Router.php(293): call_user_func(Object(Closure), Array)\n#18 \/var\/www\/nextcloud\/lib\/base.php(983): OC\Route\Router->match('\/s\/MEWznleDQZDF...')\n#19 \/var\/www\/nextcloud\/index.php(48): OC::handleRequest()\n#20 {main}","File":"\/var\/www\/nextcloud\/apps\/encryption\/lib\/Session.php","Line":79}

I found out that there was the same problem in Owncloud 8.2 and it was fixed here:

owncloud/core#21612

[rullzer]

Fixed with #4030