Velocity error on "Step 4 - Report" of the DW after migrating to 5.4.3

Failed to execute the [velocity] macro

java.lang.OutOfMemoryError: Java heap space
	at java.util.Arrays.copyOf(Unknown Source)
	at java.lang.AbstractStringBuilder.expandCapacity(Unknown Source)
	at java.lang.AbstractStringBuilder.ensureCapacityInternal(Unknown Source)
	at java.lang.AbstractStringBuilder.append(Unknown Source)
	at java.lang.StringBuilder.append(Unknown Source)
	at org.xwiki.rendering.wikimodel.xwiki.xwiki21.javacc.XWikiScanner.macro(XWikiScanner.java:377)
	at org.xwiki.rendering.wikimodel.xwiki.xwiki21.javacc.XWikiScanner.docElements(XWikiScanner.java:284)
	at org.xwiki.rendering.wikimodel.xwiki.xwiki21.javacc.XWikiScanner.doParse(XWikiScanner.java:216)
	at org.xwiki.rendering.wikimodel.xwiki.xwiki21.javacc.XWikiScanner.parse(XWikiScanner.java:51)
	at org.xwiki.rendering.wikimodel.xwiki.xwiki21.XWikiParser.parse(XWikiParser.java:44)
	at org.xwiki.rendering.internal.parser.wikimodel.AbstractWikiModelParser.parse(AbstractWikiModelParser.java:130)
	at org.xwiki.rendering.internal.parser.wikimodel.AbstractWikiModelParser.parse(AbstractWikiModelParser.java:95)
	at org.xwiki.rendering.internal.macro.DefaultMacroContentParser.parse(DefaultMacroContentParser.java:87)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.parseSourceSyntax(AbstractScriptMacro.java:324)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.parseScriptResult(AbstractScriptMacro.java:228)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.evaluateBlock(AbstractScriptMacro.java:307)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.execute(AbstractScriptMacro.java:198)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.execute(AbstractScriptMacro.java:59)
	at org.xwiki.rendering.internal.transformation.macro.MacroTransformation.transformOnce(MacroTransformation.java:191)
	at org.xwiki.rendering.internal.transformation.macro.MacroTransformation.transform(MacroTransformation.java:132)
	at org.xwiki.rendering.internal.transformation.DefaultTransformationManager.performTransformations(DefaultTransformationManager.java:87)
	at org.xwiki.extension.distribution.internal.DistributionScriptService.transform(DistributionScriptService.java:276)
	at org.xwiki.extension.distribution.internal.DistributionScriptService.renderCurrentStepToXHTML(DistributionScriptService.java:253)
	at org.xwiki.extension.distribution.internal.DistributionScriptService.renderCurrentStepToXHTML(DistributionScriptService.java:237)
	at sun.reflect.GeneratedMethodAccessor660.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
	at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)