Test message for F1 Help test. Variables & and & are specified

What causes this issue?

This is a test message

System Response

Two variables are hidden: &V1& and &V2& .

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

<ZH>Test for the Character Formats</>
This is a description
This text is in <ZK>italics</>
This text is <ZH>highlighted</>
This is an <AB>ABAP language element</>
Dieses ist nicht <NP>proportional font</>
Field label <LS>Menu Options</>
<ZH>Test for Links</>
<DS:TX.ABAP_COMM_FOR_SYSTEM_USE>General Text</>
<DS:OD.BPJOB CLOSE>BOR Object</>
<DS:IS.BSP CALL>BSP Extension Object</>
<DS:UO.S_WDR_P13N>Authorization Object</>
<DS:BI.BADI1_IMP1>Business Add Ins: Implementation</>
<DS:CATT./TEST40P/TESTH>CATT (Computer Aided Test Tool)</>
<DS:DE.WDY_APPL_ATTR_DEFAULT_VALUE>Data Element</>
<DS:GLOS.3526B800AFAB52B9E10000009B38F974>from the Glossary</>
<DS:ID.ORG TRIDOC01>IDoc Type</>
<DS:IF.IF_WDR_VIEW_DELEGATE>Interface</>
<DS:IA.IF_BSP_RUNTIME SESSION_ID>Interface Attributes</>
<DS:IE.IF_ECL_LAYER ALL_LAYERS_REMOVED>Interface Event
</>
<DS:IO.IF_WDX_CONTEXT_MEDIATOR GET_ACTION_ENABLED_PATH>Interface
Method</>
<DS:CL.CL_WDR_PORTAL_OBNWEB_SERVICE>Class</>
<DS:CA.CL_WDR_CONTEXT_NODE_INFO STATIC_ELEMENT_RTTI>Class ttribute
</>
<DS:CE.CL_ABAP_TYPEDESCR CREATE_ELEMDESCR>Class Event</>
<DS:CO.CL_ABAP_TABLEDESCR CREATE>Class Method</>
<DS:TRAN.SE91>Link to Transaction</>
<DS:TRAS.SE91>Link to Transaction and Skip First Screen</>
<DS:NA.ZAU_TEST001>Message</>
<DS:REPO.RSPARAM>Online Execution of a Report</>
<DS:REPN.RSPARAM>Online Execution of a rRport with Parameter Selection
</>
<DS:RE.RSPARAM>Report, Function Grouup Log.DB</>
<DS:ABAP.INSERT>Syntax Documentation ABAP</>
<DS:WORD.HELLO ALAIN>Unit of a Structure in WinWord Format</>
<ZH>Test for Symbols</>
Date <ZH>&DATE&</>
User Name <ZH>&SYST-UNAME&</>

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.