MediaWiki internal error.

Original exception: [ZgYAkgbwBJtyBYFb3EuLqAAAkHM] /wiki/index.php?title=R.J._Brande/Reboot Wikimedia\Assert\PostconditionException from line 140 of /home1/legionwo/public_html/wiki/wiki/vendor/wikimedia/assert/src/Assert.php: Postcondition failed: makeTitleSafe() should always return a Title for the text returned by getRootText().
Backtrace:
#0 /home1/legionwo/public_html/wiki/wiki/includes/Title.php(1893): Wikimedia\Assert\Assert::postcondition(boolean, string)
#1 /home1/legionwo/public_html/wiki/wiki/includes/skins/Skin.php(472): Title->getRootTitle()
#2 /home1/legionwo/public_html/wiki/wiki/includes/OutputPage.php(3080): Skin->getPageClasses(Title)
#3 /home1/legionwo/public_html/wiki/wiki/includes/skins/SkinTemplate.php(459): OutputPage->headElement(SkinMonoBook)
#4 /home1/legionwo/public_html/wiki/wiki/includes/skins/SkinTemplate.php(215): SkinTemplate->prepareQuickTemplate()
#5 /home1/legionwo/public_html/wiki/wiki/includes/OutputPage.php(2574): SkinTemplate->outputPage()
#6 /home1/legionwo/public_html/wiki/wiki/includes/MediaWiki.php(907): OutputPage->output(boolean)
#7 /home1/legionwo/public_html/wiki/wiki/includes/MediaWiki.php(919): MediaWiki->{closure}()
#8 /home1/legionwo/public_html/wiki/wiki/includes/MediaWiki.php(527): MediaWiki->main()
#9 /home1/legionwo/public_html/wiki/wiki/index.php(44): MediaWiki->run()
#10 {main}

Exception caught inside exception handler: [ZgYAkgbwBJtyBYFb3EuLqAAAkHM] /wiki/index.php?title=R.J._Brande/Reboot Wikimedia\Assert\PostconditionException from line 140 of /home1/legionwo/public_html/wiki/wiki/vendor/wikimedia/assert/src/Assert.php: Postcondition failed: makeTitleSafe() should always return a Title for the text returned by getRootText().
Backtrace:
#0 /home1/legionwo/public_html/wiki/wiki/includes/Title.php(1893): Wikimedia\Assert\Assert::postcondition(boolean, string)
#1 /home1/legionwo/public_html/wiki/wiki/includes/skins/Skin.php(472): Title->getRootTitle()
#2 /home1/legionwo/public_html/wiki/wiki/includes/OutputPage.php(3080): Skin->getPageClasses(Title)
#3 /home1/legionwo/public_html/wiki/wiki/includes/skins/SkinTemplate.php(459): OutputPage->headElement(SkinMonoBook)
#4 /home1/legionwo/public_html/wiki/wiki/includes/skins/SkinTemplate.php(215): SkinTemplate->prepareQuickTemplate()
#5 /home1/legionwo/public_html/wiki/wiki/includes/OutputPage.php(2574): SkinTemplate->outputPage()
#6 /home1/legionwo/public_html/wiki/wiki/includes/exception/MWExceptionRenderer.php(134): OutputPage->output()
#7 /home1/legionwo/public_html/wiki/wiki/includes/exception/MWExceptionRenderer.php(53): MWExceptionRenderer::reportHTML(Wikimedia\Assert\PostconditionException)
#8 /home1/legionwo/public_html/wiki/wiki/includes/exception/MWExceptionHandler.php(121): MWExceptionRenderer::output(Wikimedia\Assert\PostconditionException, integer)
#9 /home1/legionwo/public_html/wiki/wiki/includes/exception/MWExceptionHandler.php(195): MWExceptionHandler::report(Wikimedia\Assert\PostconditionException)
#10 /home1/legionwo/public_html/wiki/wiki/includes/MediaWiki.php(558): MWExceptionHandler::handleException(Wikimedia\Assert\PostconditionException)
#11 /home1/legionwo/public_html/wiki/wiki/index.php(44): MediaWiki->run()
#12 {main}