NPE when exporting to HTML and the attachment cannot be found

2024-01-03 14:08:49,927 [qtp1827725498-19 - http://localhost:8080/xwiki/bin/export/Space/Page?format=html&pages=%25.%25&name=AllPages] ERROR c.x.x.w.ExportURLFactory       - Failed to create attachment URL 
java.lang.NullPointerException: null
	at com.xpn.xwiki.web.ExportURLFactory.createAttachmentURL(ExportURLFactory.java:534)
	at com.xpn.xwiki.web.ExportURLFactory.createAttachmentURL(ExportURLFactory.java:556)
	at com.xpn.xwiki.XWiki.getAttachmentURL(XWiki.java:5578)
	at com.xpn.xwiki.XWiki.getAttachmentURL(XWiki.java:5589)
	at com.xpn.xwiki.XWiki.getAttachmentURL(XWiki.java:5626)
	at com.xpn.xwiki.XWiki.getAttachmentURL(XWiki.java:5614)
	at com.xpn.xwiki.api.XWiki.getAttachmentURL(XWiki.java:1927)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:571)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:554)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:221)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:368)
	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:492)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:439)
	at org.apache.velocity.Template.merge(Template.java:358)
	at org.apache.velocity.Template.merge(Template.java:262)
	at org.xwiki.velocity.internal.InternalVelocityEngine.evaluate(InternalVelocityEngine.java:225)
	at org.xwiki.velocity.internal.InternalVelocityEngine.evaluate(InternalVelocityEngine.java:173)
	at org.xwiki.rendering.internal.macro.velocity.VelocityMacro.evaluateString(VelocityMacro.java:177)
	at org.xwiki.rendering.internal.macro.velocity.VelocityMacro.evaluateString(VelocityMacro.java:60)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.evaluateBlock(AbstractScriptMacro.java:279)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.execute(AbstractScriptMacro.java:182)
	at org.xwiki.rendering.macro.script.AbstractScriptMacro.execute(AbstractScriptMacro.java:58)
	at org.xwiki.rendering.internal.transformation.macro.MacroTransformation.transform(MacroTransformation.java:311)
...