Error Message and Sheet Won't Open

[DivertedCircle]

While creating a new monster and flipping between sheet types I suddenly got this error and can no longer open the monsters sheet.

Error: An error occurred while rendering MonsterBlock5e 35. You are accessing the Item5e "data" field of which was deprecated in v10 and replaced with "system". Continued usage of pre-v10 ".data" paths is no longer supported"
[Detected 4 packages: monsterblock(3.5.1), system:dnd5e(4.2.2), lib-wrapper(1.13.2.0), item-piles(3.1.6)]
    onError foundry.js:654
    onError#0 libWrapper-wrapper.js:188
    render foundry.js:5795
    promise callback*render foundry.js:5793
    call_wrapped libWrapper-wrapper.js:511
    registerLibwrappers libwrapper.js:54
    render#0 libWrapper-wrapper.js:191
    _onClickEntryName foundry.js:73976
    call_wrapped libWrapper-wrapper.js:511
    registerLibwrappers libwrapper.js:34
    _onClickEntryName#0 libWrapper-wrapper.js:191
    jQuery 2
Caused by: Error: You are accessing the Item5e "data" field of which was deprecated in v10 and replaced with "system". Continued usage of pre-v10 ".data" paths is no longer supported"
[Detected 4 packages: monsterblock(3.5.1), system:dnd5e(4.2.2), lib-wrapper(1.13.2.0), item-piles(3.1.6)]
    get data foundry-esm.js:12037
    getCastingAbility CastingPreper.js:563
    prepare CastingPreper.js:129
    prepareItem ItemPrep.js:103
    organizeFeatures ItemPrep.js:85
    prepareItems ItemPrep.js:62
    ItemPrep ItemPrep.js:36
    _prepareItems MonsterBlock5e.js:595
    getData base-sheet.mjs:191
    getData npc-sheet.mjs:24
    getData MonsterBlock5e.js:66
    _render foundry.js:5838
    _render foundry.js:6572
    _render foundry.js:7158
    render foundry.js:5793
    call_wrapped libWrapper-wrapper.js:511
    registerLibwrappers libwrapper.js:54
    render#0 libWrapper-wrapper.js:191
    _onClickEntryName foundry.js:73976
    call_wrapped libWrapper-wrapper.js:511
    registerLibwrappers libwrapper.js:34
    _onClickEntryName#0 libWrapper-wrapper.js:191
    jQuery 2
foundry.js:655:30

[zeel01]

Look like more data/system issues.