when I enter this task, my screen turns white and everything disappears

[SadBatya]

let promiseTwo = new Promise((resolve, reject) => {
resolve("a");
});
promiseTwo
.then((res) => {
return res + "b";
})
.then((res) => {
return res + "с";
})
.finally((res) => {
return res + "!!!!!!!";
})
.catch((res) => {
return res + "d";
})
.then((res) => {
console.log(res);
});

[SadBatya]

and in console i have this error

console.js:288 DOMException: Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range.
at https://www.jsv9000.app/static/js/main.61ee41a9.chunk.js:1:16875
at Xo (https://www.jsv9000.app/static/js/2.7f47a97c.chunk.js:1:671404)
at ja (https://www.jsv9000.app/static/js/2.7f47a97c.chunk.js:1:680292)
at bs (https://www.jsv9000.app/static/js/2.7f47a97c.chunk.js:1:719153)
at bl (https://www.jsv9000.app/static/js/2.7f47a97c.chunk.js:1:710558)
at vl (https://www.jsv9000.app/static/js/2.7f47a97c.chunk.js:1:710483)
at ul (https://www.jsv9000.app/static/js/2.7f47a97c.chunk.js:1:707485)
at https://www.jsv9000.app/static/js/2.7f47a97c.chunk.js:1:658675
at t.unstable_runWithPriority (https://www.jsv9000.app/static/js/2.7f47a97c.chunk.js:1:734345)
at Hi (https://www.jsv9000.app/static/js/2.7f47a97c.chunk.js:1:658385)

[SadBatya]

everything works with other tasks