<p style="box-sizing: border-box; padding: 0px; line-height: 1.5; font-size: 16px; color: #24292e; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'; background-color: #ffffff; margin: 0px !important 0px 12px 0px;">안녕하세여
<p style="box-sizing: border-box; padding: 0px; line-height: 1.5; font-size: 16px; color: #24292e; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'; background-color: #ffffff; margin: 0px !important 0px 12px 0px;">질문이 있습니다&nbsp;
<p style="box-sizing: border-box; margin: 0px 0px 12px; padding: 0px; line-height: 1.5; font-size: 16px; color: #24292e; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'; background-color: #ffffff;">아래의 객체를 만들때 에러가 발생해여&nbsp;
<pre class="language-javascript" style="box-sizing: border-box; margin-top: 12px; margin-bottom: 12px; padding: 12px; -webkit-font-smoothing: auto; font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace; background: #2d2d2d; color: #cccccc; font-size: 14px; overflow: auto; overflow-wrap: normal; text-shadow: #ffffff 0px 1px; word-break: normal; line-height: 1.5; tab-size: 4; hyphens: none; border-radius: 3px;"><code> final TextEditingController = TextEditingController();</code></pre>
<p style="box-sizing: border-box; margin: 0px 0px 12px; padding: 0px; line-height: 1.5; font-size: 16px; color: #24292e; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji'; background-color: #ffffff;">에러 메세지는
<pre class="lang-dart s-code-block hljs" style="box-sizing: border-box; margin-top: 0px; padding: 16px; -webkit-font-smoothing: auto; font-family: SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace; background-color: #f6f8fa; color: #454545; font-size: 13.6px; overflow: auto; overflow-wrap: normal; line-height: 1.45; border-radius: 3px; margin-bottom: 0px !important;"><code style="box-sizing: border-box; background: initial; border-radius: 3px; padding: 0px; -webkit-font-smoothing: auto; font-family: SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace; color: currentcolor; margin: 0px; word-break: normal; border: 0px; display: inline; overflow: visible; line-height: inherit; overflow-wrap: normal;">Only static members can be accessed in initializers.</code></pre>
입니다&nbsp;
에러 원인이나 고치는 방법을 알려주실수 있나요?
감사합니다

작성하신 코드 그대로를 올려주신 거라면 오타 때문인 것 같습니다.
final 상수 이름이 클래스 이름과 동일합니다. 변수나 상수는 소문자로 시작하는 것이 관행이니
final textEditingController = TextEditingController(); 가 맞겠지요.

인프런 커뮤니티 질문&답변

TextEditingController 객체를 만들때 에러가 발생해여