0.8.7 Error message after High Ground on Firefox, prompts to load from previous checkpoint

[Shrike]

I just finished High Ground with Liaden, Cait, and Brint. Chose to 1v1 duel with the Incubus and won, crashed when I went back to Hawkethorne,

version: 0.8.7 value@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7168321 value@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7167876 os@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7931725 pl@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7949277 60053/t.unstable_runWithPriority@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:8024545 Fa@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7893454 dl@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7945945 tl@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7942171 64448/za/<@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7893745 60053/t.unstable_runWithPriority@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:8024545 Fa@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7893454 za@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7893692 Ka@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7893625 x@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7962069 Vt@https://www.fenoxo.com/play/CoC2/release/manifest.2cca7a80825999842492.js:2:7871030