I get this error while wondering around TR map 2. Is it serious? Should I carry on playing or try reinstalling TR and starting a new character?

I have (quite) a minimal selection of mods, so I am guessing it is not an obvious conflict or anything.

Here is my load order -

001_ Morrowind.esm
_002_ Tribunal.esm
_003_ Bloodmoon.esm
_004_ Siege at Firemoth Fort.esm
_005_ GDR_MasterFile.esm
_006_ TR_Data.esm
_007_ TR_Map1.esm
_008_ TR_Map2.esm
_009_ Morrowind Patch v1.6.5-BETA.esm
_010_ BT_Whitewolf_2_0.esm
_011_ Rise of House Telvanni.esm
_012_ Better Bodies.esp
_013_ Nymeria's Faster Walk.esp
_014_ Passive_Healthy_Wildlife.esp
_015_ k_weather (louder sounds).esp
_016_ Vivec's Fate.esp
_017_ Adj_Magicka Regen (1.00%).esp
_018_ Uvirith's Legacy_Final_2.0.esp
_019_ UL v2.0 RoHT v1.52 Compatibility.esp
_020_ Antares' Big Mod 5.3.esp
_021_ UL_MWSE_patch.esp
_022_ UL_TLM_ambiance.esp
_023_ DB_Attack_Mod.esp
_024_ horationpcenhanced12-bm.esp
_025_ npce_mwse_patch.esp
_026_ Acheron's Camping Gear 2.esp
_027_ DN-GDRv1.esp
_028_ Spect Sorcery pt 1.esp
_029_ UniqueFinery.esp
_030_ Building Up Uvirith's Legacy1.1.ESP
_031_ Illy's Solsteim Rumour Fix.esp
_032_ TLM - Complete.esp

as long as you are able to teleport when out of Telvanni Library, there should be no problem (else just open the game console and type:
EnableTeleporting
then press enter and type:
set TR_m2_Telvlibr_teleport.teleportDisabled to 0
and then press enter

note for TR scripters:
I am not entirely sure, but maybe the issue could be avoided changing the TR_m2_telvlibr_act local script to start the global script TR_m2_telvlibr_teleport attaching/targetting it to a existing persistent and unique object, e. g.

If ( scriptrunning "TR_m2_telvlibr_teleport" == 0 )	ex_gg_portcullis_01->Startscript "TR_m2_telvlibr_teleport"Endif

or creating/placing in TESCS a new dedicated persistent object and attaching the global targeted script to it.
[edit]clarification

hey thanks for replying. What do you mean by teleport though? As in use transport/guild guide, or using the console, or mark and recall or something? Sorry, I'm somewhat of a noob.

mark, recall and almsivi/divine intervention