Show advanced section on error. Fixes #5191

core/templates/installation.php

@@ -61,13 +61,13 @@
 		</p>
 	</fieldset>
 
-	<?php if(!$_['directoryIsSet'] OR !$_['dbIsSet']): ?>
+	<?php if(!$_['directoryIsSet'] OR !$_['dbIsSet'] OR count($_['errors']) > 0): ?>
 	<fieldset id="advancedHeader">
 		<legend><a id="showAdvanced"><?php p($l->t( 'Advanced' )); ?> <img class="svg" src="<?php print_unescaped(image_path('', 'actions/caret.svg')); ?>" /></a></legend>
 	</fieldset>
 	<?php endif; ?>
 
-	<?php if(!$_['directoryIsSet']): ?>
+	<?php if(!$_['directoryIsSet'] OR count($_['errors']) > 0): ?>
 	<fieldset id="datadirField">
 		<div id="datadirContent">
 			<label for="directory"><?php p($l->t( 'Data folder' )); ?></label>
@@ -78,7 +78,7 @@
 	</fieldset>
 	<?php endif; ?>
 
-	<?php if(!$_['dbIsSet']): ?>
+	<?php if(!$_['dbIsSet'] OR count($_['errors']) > 0): ?>
 	<fieldset id='databaseField'>
 		<?php if($_['hasMySQL'] or $_['hasPostgreSQL'] or $_['hasOracle'] or $_['hasMSSQL'])
 			$hasOtherDB = true; else $hasOtherDB =false; //other than SQLite ?>